Analysis

  • max time kernel
    120s
  • max time network
    120s
  • platform
    windows7_x64
  • resource
    win7-en-20211014
  • submitted
    05-12-2021 10:54

General

  • Target

    571f12f948ea19e6ed5eec7f3b973344.exe

  • Size

    392KB

  • MD5

    571f12f948ea19e6ed5eec7f3b973344

  • SHA1

    3241f91728f2cae3f372ece53c71307329d93de5

  • SHA256

    efedecf2ac9040b4ba31a44a3c8ae15925e567d7304d8717bd40ece3b7d6a0cc

  • SHA512

    dce066b28be786225e50707fe8c8cac1b755c32e0779331e4f1b7676181c4a5ff2db77770675f0ff224dea2df69c34a3c380aa8f17264af9aeb3e0ef3df471be

Malware Config

Extracted

Family

cryptbot

C2

unic14m.top

unic14e.top

Signatures

  • CryptBot

    A C++ stealer distributed widely in bundle with other software.

  • Deletes itself 1 IoCs
  • Enumerates physical storage devices 1 TTPs

    Attempts to interact with connected storage/optical drive(s). Likely ransomware behaviour.

  • Checks processor information in registry 2 TTPs 2 IoCs

    Processor information is often read in order to detect sandboxing environments.

  • Delays execution with timeout.exe 1 IoCs
  • Suspicious use of WriteProcessMemory 8 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\571f12f948ea19e6ed5eec7f3b973344.exe
    "C:\Users\Admin\AppData\Local\Temp\571f12f948ea19e6ed5eec7f3b973344.exe"
    1⤵
    • Checks processor information in registry
    • Suspicious use of WriteProcessMemory
    PID:1872
    • C:\Windows\SysWOW64\cmd.exe
      "C:\Windows\system32\cmd.exe" /c rd /s /q C:\Users\Admin\AppData\Local\Temp\EsBAmlSrW & timeout 4 & del /f /q "C:\Users\Admin\AppData\Local\Temp\571f12f948ea19e6ed5eec7f3b973344.exe"
      2⤵
      • Deletes itself
      • Suspicious use of WriteProcessMemory
      PID:1296
      • C:\Windows\SysWOW64\timeout.exe
        timeout 4
        3⤵
        • Delays execution with timeout.exe
        PID:560

Network

MITRE ATT&CK Enterprise v6

Replay Monitor

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Downloads

  • memory/560-60-0x0000000000000000-mapping.dmp

  • memory/1296-59-0x0000000000000000-mapping.dmp

  • memory/1872-56-0x0000000076081000-0x0000000076083000-memory.dmp

    Filesize

    8KB

  • memory/1872-55-0x000000000063B000-0x0000000000661000-memory.dmp

    Filesize

    152KB

  • memory/1872-57-0x0000000000270000-0x00000000002B7000-memory.dmp

    Filesize

    284KB

  • memory/1872-58-0x0000000000400000-0x0000000000469000-memory.dmp

    Filesize

    420KB